![](https://img1.daumcdn.net/thumb/R750x0/?scode=mtistory2&fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdn%2FcHEJZj%2Fbtq3TW88yI2%2FFwwRCrmngq0dnOMCHfvC0K%2Fimg.gif)
MainActivity.java public class MainActivity extends AppCompatActivity { private FragmentManager fragmentManager; private Fragment_Main fragment_main; private Fragment_MyPage fragment_my_page; private FragmentTransaction fragmentTransaction; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); fragmentManager = ..